My friend lost his Mom i have to convince him through words.Please suggest me

First of all i want to say how sorry i am, but there is really nothing you can say to your friend, its more about just ebing there for him and being someone he can talk too, there is no right or wrong thing to say, and there will be times when your friend doesnt want you there at all and just wants to be alone, just go with the flow and be a friend